diff --git a/data/full_doc_ext/bbox-ballotbox-key-cp.json b/data/full_doc_ext/BBox-ballotbox-key-CP.json
similarity index 100%
rename from data/full_doc_ext/bbox-ballotbox-key-cp.json
rename to data/full_doc_ext/BBox-ballotbox-key-CP.json
diff --git a/data/language_change/bbox-ballotbox-key-cp.json b/data/language_change/BBox-ballotbox-key-CP.json
similarity index 100%
rename from data/language_change/bbox-ballotbox-key-cp.json
rename to data/language_change/BBox-ballotbox-key-CP.json
diff --git a/environment.yml b/environment.yml
index 231e66e..255aa96 100644
--- a/environment.yml
+++ b/environment.yml
@@ -10,6 +10,6 @@ dependencies:
     - gmpy2
     - pyqt5
     - python-gnupg
-    - PyPDF2
+    - pypdf
     - argparse
 
diff --git a/requirements.txt b/requirements.txt
index e9e76d2..c4c58ea 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,6 +3,6 @@ pycryptodome
 gmpy2
 pyqt5
 python-gnupg
-PyPDF2
+pypdf
 argparse
 
diff --git a/src/polyas_checker.py b/src/polyas_checker.py
index 140ee9e..db6c22b 100644
--- a/src/polyas_checker.py
+++ b/src/polyas_checker.py
@@ -3,7 +3,7 @@
 # Copyright © 2019-2023, Karlsruhe Institute of Technology (KIT), Maximilian Noppel, Christoph Niederbudde
 
 import logging
-import PyPDF2
+import pypdf
 import argparse
 import hashlib
 import json
@@ -624,9 +624,9 @@ def verify_second_device_public_parameters(path, phase1=None):
     keygen = load_key_gen_election_key(path)
     verificationKey = ""
     try:
-        verificationKey = loadSecureJSON(path, "bbox-ballotbox-key-cp.json", sequence=False)
+        verificationKey = loadSecureJSON(path, "BBox-ballotbox-key-CP.json", sequence=False)
     except Exception:
-        logger.info("No file with verification key found: bbox-ballotbox-key-cp.json")
+        logger.info("No file with verification key found: BBox-ballotbox-key-CP.json")
         if phase1:
             phase1.setValue(100)
             phase1.setStyleSheet(redStyle)
@@ -682,7 +682,7 @@ def get_signature_if_valid(receiptPath: str, file: str, key: str, logTo=None):
     Returns fingerprint if the file is valid, else None
     """
     f = open(os.path.join(receiptPath, file), 'rb')
-    reader = PyPDF2.PdfReader(f)
+    reader = pypdf.PdfReader(f)
     receipt = reader.pages[0].extract_text().replace("\n", "")
     f.close()
     fingerprintList = re.findall(r".*BEGIN FINGERPRINT----- ?([0-9|a-f]*) ?-----END FINGERPRINT.*", receipt)
@@ -706,11 +706,11 @@ def verify_receipts(path, phase1=None, log=False, logTo=None):
     verificationKey = None
     receiptPath = os.path.join(path, "receipts")
     try:
-        verificationKey = loadSecureJSON(path, "bbox-ballotbox-key-cp.json", sequence=False)
+        verificationKey = loadSecureJSON(path, "BBox-ballotbox-key-CP.json", sequence=False)
         if phase1:
             phase1.setValue(25)
     except Exception:
-        logger.info("No file with verification key found: bbox-ballotbox-key-cp.json")
+        logger.info("No file with verification key found: BBox-ballotbox-key-CP.json")
         if phase1:
             phase1.setValue(100)
             phase1.setStyleSheet(redStyle)
diff --git a/src/test/integrationtests.py b/src/test/integrationtests.py
index 17d8566..a311faf 100644
--- a/src/test/integrationtests.py
+++ b/src/test/integrationtests.py
@@ -101,13 +101,13 @@ def testValidFingerprint(self):
 
     def testValidReceipt(self):
         path = "../data/full_doc_ext"
-        key = loadSecureJSON(path, "bbox-ballotbox-key-cp.json")
+        key = loadSecureJSON(path, "BBox-ballotbox-key-CP.json")
         gpg = initialize_gpg([key])
         self.assertNotEqual(get_signature_if_valid(path + "/receipts", "b1.pdf", gpg, key), None)
 
     def testInvalidReceipt(self):
         path = "../data/full_doc_ext"
-        key = loadSecureJSON(path, "bbox-ballotbox-key-cp.json")
+        key = loadSecureJSON(path, "BBox-ballotbox-key-CP.json")
         gpg = initialize_gpg([key])
         self.assertEqual(get_signature_if_valid(path + "/receipts", "b2.pdf", gpg, key), None)